You can find a lot of source code of current fremantle apps here:
http://repository.maemo.org/extras-d...e/free/source/

One example is the fremantle version of my mClock:
http://repository.maemo.org/extras-d...urce/m/mclock/ (It is however quite special as it includes a PyGTK/PyGame mix).

Mayn others include much better apps like gPodder or pyGTKEditor.